Over the last several years, my wife and I have become reasonably skillful practitioners in the art of buying items in bulk, through trial and error. Our goal, of course, is to save money. A well-executed bulk purchase of an item can save you a lot of money. A poorly-executed one, though, can cost you money, as we've…

Warehouse stores like Costco or Sams are great places to get good prices on bulk products and discounts on electronics or gasoline, but they're not for everyone. Some people don't like paying a fee just to shop, or maybe you don't have space for bulk goods. We want to know: do you shop at warehouse stores? If you do,…